Polyethylene base resin powder and preparation method thereof

A basic resin and polyethylene technology, applied in the field of special materials for hollow blow molding, to achieve the effects of excellent environmental stress crack resistance, low melt index and high mechanical strength

Inactive Publication Date: 2017-06-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

30% of the traditional high-pressure method investment, 1 / 6 of the operating cost

Method used

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  • Polyethylene base resin powder and preparation method thereof
  • Polyethylene base resin powder and preparation method thereof
  • Polyethylene base resin powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Raw materials for ethylene hexene copolymerized polyethylene base resin:

[0038] 1) The feed rate of polymer grade ethylene is 29.5 tons / hour;

[0039] 2) Catalyst: Titanium modification, silica gel as carrier, chromium catalyst with a particle size of 5-10 μm added at an amount of 1.5kg / hour; the catalyst activity is 15000gPE / gCat;

[0040] 3) 1-hexene addition 260kg / hour;

[0041] 4) The amount of oxygen added is 0.067kg / h;

[0042] 5) The amount of hydrogen added is 0.00kg / h;

[0043] The mixed gas is always in a circulating state, the refined raw materials ethylene and 1-hexene are placed in the raw material tank, and added to the reactor in proportion to establish a reaction system, and the activated catalyst is added to adjust the reaction temperature in the reactor 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, the melt flow rate to the reaction product is 6.5g / 10min, and the density is 0.947g / cm 3, to obtain ethylene, 1-hexene copolymeri...

Embodiment 2

[0046] Ethylene, 1-hexene copolymerized polyethylene base resin powder raw materials:

[0047] 1) The feed rate of polymer grade ethylene is 30.0 tons / hour;

[0048] 2) Catalyst: Titanium modification, silica gel as carrier, chromium catalyst with a particle size of 5-10 μm added at an amount of 1.5kg / hour; the catalyst activity is 16000gPE / gCat;

[0049] 3) The amount of 1-hexene added is 270kg / hour;

[0050] 4) The amount of oxygen added is 0.067kg / h;

[0051] 5) The amount of hydrogen added is 1.1kg / h;

[0052] The mixed gas is always in a circulating state, the refined raw material ethylene and 1-hexene are placed in the raw material tank, added in proportion to the reactor, the reaction system is established, and the activated catalyst is added (pre-activation treatment and embodiment 1 Same), adjust the reaction temperature in the reactor to 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, until the melt flow rate of the reaction product is 6.5g / 10mi...

Embodiment 3

[0054] Ethylene, 1-hexene copolymerized polyethylene base resin powder raw materials:

[0055] 1) The feed rate of polymer grade ethylene is 29.0 tons / hour;

[0056] 2) Catalyst: Titanium modification, silica gel as carrier, chromium-based catalyst with a particle size of 5-10 μm added at an amount of 1.45kg / hour; the catalyst activity is 17000gPE / gCat;

[0057] 3) The amount of 1-hexene added is 250kg / hour;

[0058] 4) The amount of oxygen added is 0.065kg / h;

[0059] 5) The amount of hydrogen added is 1.0kg / h;

[0060] The mixed gas is always in a circulating state, the refined raw material ethylene and 1-hexene are placed in the raw material tank, added in proportion to the reactor, the reaction system is established, and the activated catalyst is added (pre-activation treatment and embodiment 1 Same), adjust the reaction temperature in the reactor to 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, until the melt flow rate of the reaction product is 6....

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Abstract

The invention relates to a polyethylene base resin powder for preparing an IBC barrel special material and a preparation method thereof. Polyethylene base resin is produced by a gas phase polyethylene process, the polymerization temperature is 96 DEG C-120 DEG C, and the polymerization pressure is 0.85-2.5 MPa. The prepared base resin powder is generated by copolymerization of ethylene and long-chain alpha-olefin, the weight-average molecular weight is 200-350 thousand, the molecular weight distribution index is 7-15, the alpha-olefin content is 0.5-1.5%, the melt flow rate is 5-8 g / 10 min, the density is 0.942-0.952 g / cm<3>, the low temperature impact strength (-30 DEG C) is more than 30 kJ / m<2>, and the melt strength is more than 15 cN. The special material is guaranteed to have high mechanical strength, good processing performance and high melt strength, can be guaranteed to have good antisagging property, and can meet various properties of the IBC barrel special material.

Description

technical field [0001] The invention belongs to the field of special materials for hollow blow molding, and in particular relates to a polyethylene base resin for preparing special materials for IBC barrels and a preparation method thereof. The polyethylene base resin is particularly suitable for the production of special materials for IBC barrels in large hollow containers . Background technique [0002] High-density polyethylene (HDPE) has the characteristics of high density, good rigidity and toughness, and excellent processing performance. The main consumption fields are injection molding, blow molding, film and pipe products. Blow molding to prepare hollow containers is a major aspect of HDPE use. [0003] IBC: Intermediate Bulk Container, medium-sized bulk container, is a popular name in the world; in China, it has many names: plastic container barrel, ton-packed square barrel, ton-packed container barrel, IBC barrel, IBC container barrel, etc. , which uses high-dens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/16C08F210/14C08F2/34
CPCC08F210/16C08F210/14C08F2500/07C08F2/34
Inventor 方宏宋磊高宇新张瑞王华王斯晗赵增辉杨勇韦德帅任鹤李冬霞姜进宪孙彬彬王文燕张丽丽曹婷婷王世华
Owner PETROCHINA CO LTD
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